Draining serous fluid from string implants is NOT a rumor. It's absolutely necessary to keep string implants from growing faster than the skin can safely stretch when conditions arise that cause fluid retention. You have to realize that with string implants, ANYTHING that changes the body's fluid balance causes string implanted breasts to grow - but once the skin is stretched further they don't shrink back again. This is the reason I can't indulge my passion for my favorite drink Margarita's any more. I have made a night of it a couple of times and woke up the next morning to discover that my boobs have grown 1/2" from the salt induced fluid retention, and they don't shrink afterwards when the rest of my body eventually gets rid of the retained fluid.
I've had a form of fluid draining done myself - my left breast has lots of internal scar tissue, a leftover from problems with a previous set of bag type implants. As a result, the skin of my left breast is much more difficult to stretch than the normal skin of my right breast. Since string implant size is basically a "tug of war" between the skin pressing inward and the fluid pressing outward, my right breast tends to grow faster than my left breast. To compensate for this, several times I've had my doctor drain fluid from my right breast (to stop the growth for a while) and reinject the fluid into my left breast (to force the scar tissue to stretch out so the growth will be faster than normal).
My guess on the two Maxi pictures is that the left image was taken soon after she had her string implants put in, and the right image was taken later after her string implants had the opportunity to stretch out her breast skin for a while. The last time I saw Maxi in person she was definitely bigger than ever.
I realize that you guys wouldn't have any problem if all of the string implants were like the "energizer bunny" and kept growing, and Growing, and GROWING forever ! However, there are finite limitations in regard to safe stretching of skin, load bearing capability of spinal discs etc. which at some point can force a girl with string implants to want to stop the growth, or to "lighten the load" - temporarily. Rest assured though that even if a large amount of fluid is drained from string implanted breasts, eventually that fluid will return and the breasts will grow back to their original size (and continue growing bigger if not drained again).